Vulnerability · Published Nov 1, 2026 · Assigned by VulDB

CVE-2026-120228WAVLINK WN553X1-B ioos Service sub_416D88 os command injection

Critical 9.9

In plain English

A critical-severity OS command injection in WN553X1-B from WAVLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)1.7%top 23.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A flaw has been found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_416D88 of the file /bin/ioos of the component ioos Service. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Affected products (as reported)

Vendor	Product	Versions
WAVLINK	WN553X1-B	V260403_2.0.0

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-429587 | WAVLINK WN553X1-B ioos Service sub_416D88 os command injection vdb-entry, technical-description
VDB-429587 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-120228 | CVE Analysis and Report third-party-advisory
Submit #919151 | Wavlink Router Firmware V260403_2.0.0 Authenticated Command Injection third-party-advisory
https://github.com/senxitoyshuyi-ui/IOT-CVE/blob/main/vulns/WAVLINK%20WN553X1-B%20Router.md exploit